Learn how to defeat Rogue Mega Froslass in Pokemon Legends Z-A as part of the main story to earn the Pokemon for yourself.

Pokemon Legends Z-A’s Rogue Mega Froslass is one of the toughest bosses in the game. This boss uses a variety of moves, some so brutal that they send a literal chill down your spine. You have to be hyper-aware of your surroundings to tackle Froslass’s ice-based attacks, which is easier said than done.
If you’re having trouble taking on and beating Rogue Mega Froslass in Main Mission 27, our guide is here to walk you through the fight. We shall go over the boss’s counters, weaknesses, resistances, attacks, and more.
Rogue Mega Froslass Counters

These Pokemon capable of Mega Evolution are among the best counters for dealing with the Rogue Mega Froslass:
Pokemon | Best Way To Get It | Where To Find Its Mega Stone |
---|---|---|
Aggron | You can find this Pokemon in Wild Zone 20. | Exchange for 360 Mega Shards at Quasartico Inc. |
Sharpedo | You get this Pokemon by picking up Carvanha from Wild Zone 10, and then evolving across this lineage. | Exchange for 180 Mega Shards at Quasartico Inc. |
Houndoom | You get this Pokemon by picking up Houndour from Wild Zone 6, and then evolving across this lineage. | Exchange for 180 Mega Shards at Quasartico Inc. |
Emboar | You get this Pokemon by picking up Tepig from Wild Zone 20, and then evolving across this lineage. | Buy it at the Stone Emporium for 100,000 Poke Dollars |
Excadrill | You can find this Pokemon in Wild Zone 14. | Exchange for 360 Mega Shards at Quasartico Inc. |
Related: Pokemon Legends Z-A: How To Defeat Rogue Mega Ampharos
Rogue Mega Froslass Weaknesses and Resistances
Rogue Mega Frosslass is weak to the following:
- Rock
- Ghost
- Steel
- Fire
- Dark
The Pokemon has a resistance to the following:
- Poison
- Bug
- Ice
- Normal
- Fighting
Rogue Mega Froslass Strategy and Recommended Level

Read: Pokemon Legends Z-A: A Berry Clever Plan Walkthrough (Side Quest)
Since you Rogue Mega Frolass is a Level 53 boss, you have to be at Level 53 or above if you want a fair fight. Once you’re at that level, you can then fight the boss and watch for the following attacks:
- Icy Wind: Rogue Mega Froslass sends a mini tornado towards you. Run to either side to avoid this.
- Shadow Ball: The boss summons a black orb and launches it at you. This attack is incredibly slow, so you can simply run to the side.
- Ice Pillars: The Pokemon will summon and drop large ice pillars from the sky. You have to keep moving to avoid this one.
- Blizzard: The boss summons an ice blizzard and attacks everything in the arena. You have to hide behind a block of ice to stay safe.
- Will-o-Wisp: Frosslass applies a burn status effect.
- Confuse Ray: Frosslass confuses your Pokemon.
Rogue Mega Froslass is only challenging for the mix of different moves it uses. You have to constantly move around the arena and be aware of your surroundings. As long as you’re aware of his attacks and stay on the move, you’ll be fine and can exploit his win to earn a win.

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